/*
 * Copyright (c) 2011, Georgy Markovsky 
 * All rights reserved. 
 *
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions are met: 
 *
 *  * Redistributions of source code must retain the above copyright notice, 
 *    this list of conditions and the following disclaimer. 
 *  * Redistributions in binary form must reproduce the above copyright 
 *    notice, this list of conditions and the following disclaimer in the 
 *    documentation and/or other materials provided with the distribution. 
 *  * Neither the name of  nor the names of its contributors may be used to 
 *    endorse or promote products derived from this software without specific 
 *    prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
 * POSSIBILITY OF SUCH DAMAGE. 
 */
package com.gmail.gbmarkovsky.le.elements;

import com.gmail.gbmarkovsky.le.circuit.Signal;


/**
 * Реализация логического элемента.
 * @author george
 *
 */
public class Gate extends AbstractElement {
	protected GateType type;

	public Gate(GateType type) {
		super(type.getInputCount(), type.getOutputCount());
		this.type = type;
		execute();
	}
	
	public GateType getType() {
		return type;
	}
	
	public void execute() {
		if (type == GateType.AND) {
			Signal result = Signal.TRUE;
			for(Pin pin : inputs) {
				if (pin.getSignal() == Signal.FALSE) {
					result = Signal.FALSE;
					break;
				}
			}
			outputs.get(0).setSignal(result);
		} else if (type == GateType.OR) {
			Signal result = Signal.FALSE;
			for(Pin pin : inputs) {
				if (pin.getSignal() == Signal.TRUE) {
					result = Signal.TRUE;
				}
			}
			outputs.get(0).setSignal(result);
		} else if (type == GateType.NOT) {
			outputs.get(0).setSignal(Signal.not(inputs.get(0).getSignal()));
		} else if (type == GateType.YES) {
				outputs.get(0).setSignal(inputs.get(0).getSignal());
			}
	}
}
